Huge tube tone and wide-range flexibility.
The 45W Blackstar Series One S1-45 tube guitar combo amp delivers high-gain performance with a level of tonal refinement found previously only in the very best boutique and vintage amps. By switching both preamplifier and power amplifier parameters, the 2x12 S1-45 combo delivers both Class A style tones with a bell-like ring and classic push-pull crunch depending on the mode selected. The Infinite Shape Feature (ISF) control removes the limitations of traditional designs allowing you to tune the tone to exactly the sound you are looking for. Dynamic Power Reduction (DPR) can reduce the power down to 4-1/2W and MIDI switching and a series effects loop make this the ultimate pro's combo.
The S1-45 guitar amp's Clean Channel offers a no-compromise design, by featuring Bright and Warm modes. Each mode actually reconfigures the pre-amplifier voicing and power amplifier damping to reproduce either ringing Class A performance in the Bright mode, or crunchy Class AB tones in the Warm setting.
Blackstar also paid careful attention to the S1-45 combo amp's overdrive levels. Crunch mode covers the widest range of crunch gain levels from just on the edge clean break-up, to crushing modern rhythm tones. Super Crunch mode alters both gain levels and tonal shaping for maximum crunch flexibility. The overdrive modes are characterized by a tone which is high in gain, but lacks any of the detached top-end often found in many similar designs. This is a result of unique preamplifier and power amplifier shaping, which cleans up the overdrives beautifully as the guitar volume is reduced. But even at the most extreme settings, the overdrive channels remain natural sounding.
The ISF control is unique to Blackstar Amplification and represents a major step forward in its tone-shaping flexibility. This fully interactive control allows you to infinitely adjust the response of the tone control network between British and American voicings. This results in an infinite number of alternative tone choices.
Completing the tonal feature set is the DPR system. DPR reduces the power of the output stage from full power (45W) down to 10% (4.5W) and any power output in between. This means that the full tonal depth of the EL34 power amplifier can be enjoyed at any volume, making the S1-45 ideal for recording, smaller gigs and even home practice use. Working in conjunction with the power amplifier voltages, this method of power reduction suffers none of the loss in tone of other power reduction systems.
The tonal flexibility of the S1-45 is augmented by full MIDI implementation of the main channel and mode switching functions. Used in conjunction with outboard gear such as multi-effects units, MIDI allows a whole new level of creative performance to be explored.